We have one EM-XSW 2 and one EM-XSW rack-mounted wireless receivers which are experiencing dropouts in a large cafeteria because they need to be located in a closet in a older building with stone, heavy masonry and steel-girder construction. Our experiences with network WiFi coverage in this building has forced us to over-provision our WAPs for adequate service, and I'm concerned that the wireless receivers in this closet are being affected by this building's construction. I asked a reputable audio company if the Sennheiser G4 ASA 214-UHF Active Antenna Splitter and passive A1031-U omnidirectional antennas would be an applicable setup for providing improved reception, but they said it would not work.
Can the Sennheiser passive A1031-U antennas be used alone without the splitter, and if so, do we need two antennas per receiver (total of four antennas?)
Is there a maximum cable length specified between the receiver and the A1031-U antennas?